Mercurial > sdl-ios-xcode
annotate src/timer/macos/SDL_MPWtimer.c @ 1960:118daa3a24cc
Added numlock support
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 30 Jul 2006 06:11:24 +0000 |
parents | c121d94672cb |
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0 | 1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
0 | 23 |
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24 #ifdef SDL_TIMER_MACOS |
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25 |
0 | 26 #include <Types.h> |
27 #include <Timer.h> | |
28 #include <OSUtils.h> | |
29 #include <Gestalt.h> | |
30 #include <Processes.h> | |
31 | |
32 #include <LowMem.h> | |
33 | |
34 #include "SDL_timer.h" | |
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35 #include "../SDL_timer_c.h" |
0 | 36 |
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37 #define MS_PER_TICK (1000/60) /* MacOS tick = 1/60 second */ |
0 | 38 |
39 /* Note: This is only a step above the original 1/60s implementation. | |
40 * For a good implementation, see FastTimes.[ch], by Matt Slot. | |
41 */ | |
42 #define USE_MICROSECONDS | |
43 #define WideTo64bit(w) (*(UInt64 *) &(w)) | |
44 | |
45 UInt64 start; | |
46 | |
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47 void |
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48 SDL_StartTicks(void) |
0 | 49 { |
50 #ifdef USE_MICROSECONDS | |
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51 UnsignedWide now; |
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52 |
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53 Microseconds(&now); |
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54 start = WideTo64bit(now); |
0 | 55 #else |
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56 /* FIXME: Should we implement a wrapping algorithm, like Win32? */ |
0 | 57 #endif |
58 } | |
59 | |
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60 Uint32 |
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61 SDL_GetTicks(void) |
0 | 62 { |
63 #ifdef USE_MICROSECONDS | |
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64 UnsignedWide now; |
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65 |
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66 Microseconds(&now); |
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67 return (Uint32) ((WideTo64bit(now) - start) / 1000); |
0 | 68 #else |
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69 return (LMGetTicks() * MS_PER_TICK); |
0 | 70 #endif |
71 } | |
72 | |
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73 void |
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74 SDL_Delay(Uint32 ms) |
0 | 75 { |
76 #ifdef USE_MICROSECONDS | |
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77 Uint32 end_ms; |
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78 |
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79 end_ms = SDL_GetTicks() + ms; |
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80 do { |
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81 /* FIXME: Yield CPU? */ ; |
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82 } |
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83 while (SDL_GetTicks() < end_ms); |
0 | 84 #else |
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85 UInt32 unused; /* MJS */ |
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86 Delay(ms / MS_PER_TICK, &unused); |
0 | 87 #endif |
88 } | |
89 | |
90 | |
91 /* Data to handle a single periodic alarm */ | |
92 typedef struct _ExtendedTimerRec | |
93 { | |
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94 TMTask tmTask; |
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95 ProcessSerialNumber taskPSN; |
0 | 96 } ExtendedTimerRec, *ExtendedTimerPtr; |
97 | |
98 static ExtendedTimerRec gExtendedTimerRec; | |
99 | |
100 | |
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101 int |
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102 SDL_SYS_TimerInit(void) |
0 | 103 { |
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104 /* We don't need a setup? */ |
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105 return (0); |
0 | 106 } |
107 | |
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108 void |
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109 SDL_SYS_TimerQuit(void) |
0 | 110 { |
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111 /* We don't need a cleanup? */ |
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112 return; |
0 | 113 } |
114 | |
115 /* Our Stub routine to set up and then call the real routine. */ | |
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116 pascal void |
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117 TimerCallbackProc(TMTaskPtr tmTaskPtr) |
0 | 118 { |
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119 Uint32 ms; |
0 | 120 |
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121 WakeUpProcess(&((ExtendedTimerPtr) tmTaskPtr)->taskPSN); |
0 | 122 |
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123 ms = SDL_alarm_callback(SDL_alarm_interval); |
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124 if (ms) { |
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125 SDL_alarm_interval = ROUND_RESOLUTION(ms); |
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126 PrimeTime((QElemPtr) & gExtendedTimerRec.tmTask, SDL_alarm_interval); |
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127 } else { |
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128 SDL_alarm_interval = 0; |
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129 } |
0 | 130 } |
131 | |
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132 int |
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133 SDL_SYS_StartTimer(void) |
0 | 134 { |
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135 /* |
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136 * Configure the global structure that stores the timing information. |
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137 */ |
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138 gExtendedTimerRec.tmTask.qLink = NULL; |
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139 gExtendedTimerRec.tmTask.qType = 0; |
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140 gExtendedTimerRec.tmTask.tmAddr = NewTimerUPP(TimerCallbackProc); |
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141 gExtendedTimerRec.tmTask.tmCount = 0; |
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142 gExtendedTimerRec.tmTask.tmWakeUp = 0; |
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143 gExtendedTimerRec.tmTask.tmReserved = 0; |
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144 GetCurrentProcess(&gExtendedTimerRec.taskPSN); |
0 | 145 |
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146 /* Install the task record */ |
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147 InsXTime((QElemPtr) & gExtendedTimerRec.tmTask); |
0 | 148 |
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149 /* Go! */ |
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150 PrimeTime((QElemPtr) & gExtendedTimerRec.tmTask, SDL_alarm_interval); |
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151 return (0); |
0 | 152 } |
153 | |
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154 void |
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155 SDL_SYS_StopTimer(void) |
0 | 156 { |
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157 RmvTime((QElemPtr) & gExtendedTimerRec.tmTask); |
0 | 158 } |
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159 |
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160 #endif /* SDL_TIMER_MACOS */ |
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161 /* vi: set ts=4 sw=4 expandtab: */ |